Error – could not build the proxy_headers_hash

[emerg] could not build the proxy_headers_hash, you should increase either proxy_headers_hash_max_size: 512 or proxy_headers_hash_bucket_size: 64

Symptom

If the Accelerator Version is below 5.2 then it might experience difficulties with proxy headers due to its max size directive.

Solution

When you are applying multiple header modifications and begin to experience these symptoms then an update to the Accelerator will be necessary to adjust the maximum directive size which should reduce the errors.